then you want a stock cylinder, dune ported 4 mil. i ride my cub through trails to get to the sand and it goes from 3,000 rpm to 9,500 in 1 second, real easy to get sideways or bucked into a tree,i catch myself saying WTF are you doing? 3 rd and 4 th gear through trails. on a cub you cover alotta ground in a blink.